JOURNAL OF THE COLLEGE OF SCIENCE, IMPERIAL UNIVERSITY, 

 TOKYO, JAPAN. 



VOL. XXV., ARTICLE 16. 



Preliminary Note on a New Element 

 allied to Molybdenum. 



By 

 Masataka Ogawa, Eigahushî. 



Introduction. 



In tlie course of an examination of molybdenite in connection 

 witli my work on nipponium, a substance, which was supposed 

 to be ammonium vanadate, was obtained and set aside as such 

 (This Vohime, Art. 15, p. 7). A further examination of this 

 substance has shown, however, that it is not ammonium vanadate, 

 but that it is a compound of a new element, closely allied to 

 molybdenum and, indeed, associated with it in this compound ; 

 and, although the results so far obtained are still very in- 

 complete, they are now published in the hope that they may 

 prove of sufficient interest. 



It is possible and even likely that the " new tin-group 

 element in thorianite ", an account of which has been recently 

 given by Miss Evans (J. C. S., 1908, 93, 666), is identical with 

 this element, inasmuch as the latter has been found not only in 

 molybdenite but also in thorianite and two, at least, of the very 

 few characteristic reactions ascribed to her element by Miss 

 Evans, namely the formation of a brown sulphide, insoluble in 



